You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither SPIE nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the SPIE website.
14 February 2008Multiphoton excitation of fluorescence in spherical particles: angular distribution of scattered radiation
The angular distribution of spontaneous fluorescence excited inside a spherical microparticle by femtosecond laser
radiation is considered. The distribution of the internal optical field of a particle is investigated at the multiphoton
excitation of fluorescence. The position and the effective volume of fluorescence sources in a particle are calculated
numerically as functions of the particle radius in the cases of one-, two-, and three-photon excited fluorescence. The
equation determining the relation between the mean brightness of fluorescence from the front and rear hemispheres of a
particle is derived within the framework of geometric optics. It is shown that if a fluorescence source is located near the
shadow hemisphere of a particle, asymmetry appears in the angular distribution of spontaneous fluorescence in the
forward and backward directions. This asymmetry becomes more pronounced, as the number of photons taking part in
the process increases.
The alert did not successfully save. Please try again later.
Alexander A. Zemlyanov, Yuri E. Geints, Ekaterina K. Panina, "Multiphoton excitation of fluorescence in spherical particles: angular distribution of scattered radiation," Proc. SPIE 6936, Fourteenth International Symposium on Atmospheric and Ocean Optics/Atmospheric Physics, 69360R (14 February 2008); https://doi.org/10.1117/12.783162